Company News

• How to choose a gasket? Use sealing gasket properly

  2023 / 10 / 31

  How to reasonably select and use sealing gasket media , temperature, pressure and working conditions should be important factors. For example, when the working pressure is not high, plastic flange docking (PN) is used. For another example, in a working environment with chemical media, different sealing media must be reasonably matched to achieve good results, otherwise unpredictable chemical changes are prone to occur. Therefore, any paradox in the selection of seals will lead to unimaginable consequences. Generally, the gasket structures have the following types for reference: 1. For flange connection a, flat gasket: multi-purpose medium pressure asbestos, oil-resistant asbestos, polytetrafluoroethylene, graphite gasket or reinforced graphite gasket, non-asbestos gasket, metal flat gasket, special metal gasket wait b. Spiral gasket: with outer ring or with inner and outer rings (most commonly used for flat flanges); ring type with inner ring (commonly used for concave and convex flanges); basic type (without inner and outer rings), special for grooved flanges, sealing surface Narrow, flat-welded full-face flange sealing surface is wider, equivalent to a spiral wound gasket with an inner ring and an outer ring. It is necessary to pay attention to which country and standard the flange is. 2. Rotating and pulling shaft seals use a variety of fillers. Such as flexible graphite rings (open and non-open), braided packing (or packing rings) of various materials, internal and external skeleton oil seal YX rings, O-rings, etc. of various materials. 3. Special parts sealing products. Common sealing strips, PTFE ball valve seats, graphite packing rings and rubber butterfly valve rings, etc. What should you pay attention to when installing seals? 1. Do not damage

• Seal gasket selection reference eight characteristics of gasket

  2023 / 10 / 19

  Gasket selection When any type of gasket is used, in order to ensure long-term effective sealing, the following eight important characteristics must be paid attention to when selecting and using the gasket: 1. Gas seal of gasket For the medium of the sealing system, the gasket can be used for a certain time within the appropriate temperature and pressure range without leakage. 2. Compressibility of gasket After the connection bolts are tightened, the contact surface of the gasket and flange should be well matched to ensure the sealing 3. Creep resistance of gasket Under the influence of pressure load and service temperature, the gasket should have better creep resistance, otherwise it will cause bolt torque loss, reduce the surface stress of the gasket, and cause certain leakage. 4. The chemical properties of the gasket The selected gasket needs to be able to withstand the corrosion of the medium, and at the same time, it must not cause pollution to the sealed medium. The current sealing products need to meet the environmental protection standards. For example, the BD series of sealpilot uses absolutely environmentally friendly non-asbestos sealing material Impact on sealing and environment 5. The resilience of the gasket Even when the system is stable, there will be a slight displacement due to the temperature and pressure of the two connected flanges. The elastic fu

• Working principle of plate heat exchanger gasket

  2023 / 10 / 13

  Plate heat exchanger gasket is a device used to increase the heat transfer efficiency of the heat exchanger. It can increase the heat transfer area and heat conduction efficiency of the heat exchanger. Here's how it works: 1. Increase the heat transfer area: Plate heat exchanger gaskets are usually made of metal materials and have a certain thickness. After installing the gasket, multiple narrow channels can be formed inside the heat exchanger, thereby increasing the heat transfer area. These channels allow the fluid to form a complex flow path inside the heat exchanger, increasing the contact area between the fluid and the heat exchange plate and improving heat transfer efficiency. 2. Improve heat conduction efficiency: Plate heat exchanger gaskets usually have good heat conduction properties. When heat flows through the gasket, the gasket can effectively conduct heat to the adjacent heat exchange plate, thereby improving heat transfer efficiency. Factors such as the thickness of the gasket and the thermal conductivity of the material can affect heat transfer efficiency. 3. Optimize fluid flow: Plate heat exchanger gaskets can also change the flow pattern of the fluid, thereby optimizing the flow state of the fluid. For example, gaskets can guide the fluid to form turbulent flow inside the heat exchanger, increase the mixing degree of the fluid, and improve heat transfer efficiency. In addition, the gasket can also change the flow rate and direction of the fluid so that the fluid is evenly distributed inside the heat exchanger and avoids the problem of local blockage or uneven flow of the fluid.